Suction apparatus



Gent. 1, 1935. R. FOREAU SUCTION APPARATUS Filed Sept. 24, 1954 INV TO ti R Foreal/L Patented Oct. 1, 1935 UNITED STATES PATENT OFFICE Anonyme des Anciens Etablissements A.

Chanard, Rueil (Seine and Oise), France Application September 24, 1934, Serial No. 745,358 In France September 4, 1934 3 Claims. (01. 98-66) This invention has for its object a suction apparatus, of the static aspirator type, intended to produce the aeration of premises, works, workshops, etc., to ensure the evacuation of smoke,

5 fumes, gases or other fluids, or again to be placed on chimneys for increasing the draught of the same.

This apparatus is characterized by the combination of a number of nozzles having vertical walls, and of vertical partitions placed in the plane of symmetry of each nozzle, these partitions being rigid with outer screens, the whole being arranged in such a manner that the said partitions and screens prevent rain from penetrating to the interior.

In order that the invention may be clearly understood, a form of carrying out the subject-matter of the said invention has been illustrated in the accompanying drawing, given by way of example only, and in which:

Fig. l is an elevation of the new apparatus.

Fig. 2 is a vertical section made according to line 22 of Fig. 3.

Fig. 3 is partly a plan view and partly a horizontal section made according to line 3-3 of Fig. 1.

Fig. 4 illustrates a modification.

As illustrated in the drawing, the apparatus consists in a number of curved walls a, constituting cylindrical surfaces having vertical generatrices; these surfaces form together convergent nozzles A. The angles of these nozzles are so chosen that the flow of the fluids to the exterior takes place in the best conditions and, for that purpose, these angles approximate 30. This is what is usually called nozzles presenting a favourable angle.

The surfaces 11 can be connected or not to the axis of the apparatus by radial partitions c, which separate the nozzles from each other.

In each nozzle is placed a vertical plate d which is in the plane of symmetry of the nozzle. This vertical plate is rigid with an outer screen e, the concavity of which is preferably turned outwards.

4 The combination of the plate d and of the screen e prevents rain from penetrating to the interior. In fact, it is easy to see in Fig. 3 that,

whatever may be the direction of the rain, the

be evacuated to the exterior by means of small gutters f (Fig. 2) arranged at the base of these plates.

The new arrangement has, moreover, for advantage of guiding the fluid streams, by avoiding 5 eddies and other perturbating movements within the aspirator.

In the modification illustrated in Fig. 4, the outer screen g is of convex shape. The principle, the mode of operation and the advantages are 10 essentially as in the form of construction illustrated in Fig. 3. V

The arrangements described above are of course given by way of example only; all details of construction, shapes, materials and dimensions used 15 can vary according to circumstances without departing thereby from the principle of the invention.

What I claim as my invention and desire to secure by Letters Patent is: 2O 1. In a suction apparatus, nozzles distributed on the periphery, said nozzles being constituted by plane vertical walls forming between them an angle approximating 30, vertical partitions dividing the said nozzles into two halves, the edge 25 of said partitions turned toward the interior being free from any screen while the outer edge is combined with a screen, the whole preventing the penetration of rain.

2. In a suction apparatus, nozzles distributed on 30 the periphery, said nozzles being constituted by plane vertical walls forming between them an angle approximating 30, vertical partitions dividing the said nozzles into two halves, the edge of said partitions turned toward the interior being 35 free from any screen while the outer edge is combined with a screen, the whole preventing the penetration of rain, and the said screens being concave.

.3. In a suction apparatus, nozzles distributed 40 on the periphery, said nozzles being constituted by plane vertical walls forming between them an angle approximating 30, Vertical partitions dividing the said nozzles into two halves, the edge of said partitions turned toward the interior being free from any screen while the outer edge is combined with a screen, the whole preventing the penetration of rain, and radial partitions separating the nozzles from each other.

RENE: FOREAU. 

